<template>
    <div class="goodsinfo-container">

        <transition
            @before-enter="beforeEnter" 
            @enter="enter"
            @after-enter="afterEnter">
                <div class="ball" v-if="flag" ref="ball"></div>
        </transition>

        <!-- 商品轮播图区域 -->
        <div class="mui-card">
            <div class="mui-card-content">
                <div class="mui-card-content-inner">
                    <swiper :lunbotuList="lunbotu" :isfull="false"></swiper>
                </div>
            </div>
        </div>

        <div class="mui-card">
			<div class="mui-card-header">{{ goodsinfo.title }}</div>
			<div class="mui-card-content">
				<div class="mui-card-content-inner">
					<p class="price">
                        市场价：<del>￥{{ goodsinfo.market_price }}</del>&nbsp;&nbsp;销售价：<span class="now_price">￥{{ goodsinfo.sell_price }}</span>
                    </p>
				</div>
                <p>购买数量：<numbox @getconut="getSelectedCount" :max="goodsinfo.stock_quantity"></numbox></p>
                <p>
                    <mt-button type="primary" size="small">立即购买</mt-button>
                    <mt-button type="danger" size="small" @click="addToShopCar">加入购物车</mt-button>
                </p>
			</div>
		</div>

        <div class="mui-card">
				<div class="mui-card-header">商品参数</div>
				<div class="mui-card-content">
					<div class="mui-card-content-inner">
						<p>商品货号：{{goodsinfo.goods_no}}</p>
                        <p>库存情况：{{goodsinfo.stock_quantity}}件</p>
                        <p>上架时间：{{goodsinfo.add_time | dateFormat}}</p>
					</div>
				</div>
				<div class="mui-card-footer">
                    <mt-button type="primary" size="large" plain @click="goDesc(id)">图文介绍</mt-button>
                    <mt-button type="danger" size="large" plain @click="goComment(id)">商品评论</mt-button>
                </div>
		</div>
    </div>
</template>

<script>
import swiper from '../subcomponents/swiper.vue'
import numbox from '../subcomponents/goodsinfo_numbox.vue'

export default {
    data (){
        return {
            id: this.$route.params.id,
            lunbotu:　[],
            goodsinfo: {},
            flag: false,
            SelectedCount:1//保存用户选择的商品数量 默认 认为用户买一个
        }
    },
    created(){
        this.getLunbotu();
        this.getGoodsInfo();
    },
    methods: {
        getLunbotu(){
            this.$http.get('api/getthumimages/' + this.id).then(result=>{
               if(result.body.status === 0){
                   //先循环轮播图数组的每一项 为item添加img属性 因为轮播图组件中 只人生item.img 不认识 item.src
                   result.body.message.forEach(item => {
                       item.img = item.src
                   });
                   this.lunbotu = result.body.message;
               }
            })
        },
        getGoodsInfo(){
            this.$http.get('api/goods/getinfo/' + this.id).then(result=>{
                if(result.body.status === 0){
                    this.goodsinfo = result.body.message[0]
                }
            })
        },
        goDesc(id){
            //点击使用编程式导航
            this.$router.push({name:"goodsdesc",params:{ id } });
        },
        goComment(id){
            //点击跳转评论
            this.$router.push({name:"goodscomment",params:{ id } });
        },
        addToShopCar(){
            //添加到购物车
            this.flag = !this.flag;
            //拼接出一个要保存到store中的car对象
            var goodsinfo = {
                id:this.id,
                count:this.SelectedCount,
                price:this.goodsinfo.sell_price,
                selected:true
            };
                //调用store中的 addtoCar push进去
            this.$store.commit("addToCar", goodsinfo);
        },
        beforeEnter(el){
            el.style.transform = "translate(0, 0)";
        },
        enter(el,done){
            el.offsetWidth;
            // this.$refs.move.style.transition = linear;
            // 获取小球的 在页面中的位置
            const ballPosition = this.$refs.ball.getBoundingClientRect();//小球在页面中的位置
            const badgePosition = document.getElementById('badge').getBoundingClientRect();//徽标在页面中的位置
            const xDist = badgePosition.left - ballPosition.left;
            const yDist = badgePosition.top - ballPosition.top
            el.style.transform = `translate(${xDist}px,${yDist}px)`;
            el.style.transition = 'all 0.5s cubic-bezier(.4,-0.3,1,.68)';
            done();
        },
        afterEnter(el){
             this.flag = !this.flag;
        },
        getSelectedCount(count){
            //当子组件把选中的数量传递给父组件的时候，把选中的值保存到data上
            this.SelectedCount = count;
           
        }
    },
    components: {
        swiper,
        numbox
    }

}
</script>

<style lang="scss" scoped>
.goodsinfo-container{
    background-color: #eee;
    overflow: hidden;
    .now_price{
        color:#f40;
        font-size: 14px;
        font-weight: bold;
    }
    .mui-card-footer{
        display: block;
        button{
            margin:15px 0;
        }
    }
    .mui-card-content{
        p{
            margin-left:15px;
        }
        
    }
    .ball{
        width: 15px;
        height: 15px;
        border-radius:50%;
        background-color: red;
        position: absolute;
        top: 390px;
        left: 163px;
        z-index: 99;
       
    }
    .mui-icon-extra{
        font-size: 17px;
    }
}
</style>